baber/WOPTO huggingface dataset:
Patent GB-1516526-A (GB)
Title: Variable spot size scanning system
IPC: G03G15/04
Filed: 1975-10-17
Abstract: 1516526 Scanning systems XEROX CORP 17 Oct 1975 [23 Dec 1974] 42688/75 Heading G2J A scanning system comprises a light source 10 (e.g. a laser) whose beam is modulated at 14 and vertically deflected at 18 before reflection at 20. The beam is broadened in the tangential plane by a cylindrical lens 23 and focused by spherical lens 26 such that the facets of a rotating polygon scanner 28 are illuminated by a wide narrow beam 32 or 33 across about two facets, the reflected beam being brought to a focus via a saggital plane cylindrical lens 34 at a photo-receptor 36. The facets of the polygon are narrower at their base than at the top, and the position of the beam 32 (or 33) is adjusted by the vertical deflector 18. It is stated that the size of the spot may thereby be controlled. The polygon scanner may be replaced by a single oscillating facet. The facets may have portions of discretely differing width rather than the continuous variation shown in Fig. 1.
Patent GB-1092745-A (GB)
Title: Engine installations and starting means therefore
Inventor: ELMES ROBERT TERENCE
IPC: F02C7/275
Filed: 1965-10-11
Abstract: 1,092,745. Engine turning gear; gas turbine plant. DOWTY ROTOL Ltd. Sept. 20, 1966 [Oct. 11, 1965], No.42986/65. Headings F1G, F1K and F1Q. In an engine installation having at least two engines 11, 12 each of which is connected to drive accessories mounted upon a respective gear-box 19, 20 and including a single starting means 46 connectible through the respective gear-box to each engine in turn by appropriate operation of clutches one clutch 37, 38 being provided in the drive between the starting means and each one of the gear-boxes and one clutch 13, 14 being provided in the drive between each gear-box and each engine, the arrangement is such that with both or all the engines inoperative the accessories on one or more of the gear-boxes can all be driven by the single starting means. The single starting means 46 may be a starter motor of gas turbine type and the engines 11, 12 may be gas turbine engines. The installation may be designed to power an aircraft and the accessories carried upon the gear-boxes used to power electrical and hydraulic services within the aircraft. Freewheel means may be provided upon the output shaft of the gas turbine type starter motor so that the motor can be stopped when at least one of the engines is running at and above its self sustaining speed. If any one or more of the engines become inoperative then by suitable operation of the clutches the remaining operative engine or engines can be connected to drive the respective gear-box or gear-boxes of the inoperative engine or engines. The control system includes electrically powered means (not shown) for operation of the clutch, interconnected through suitable switching devices with the electrical igniter system and with the fuel system of the starter motor 46. The invention is applicable to other vehicles or stationary plant.
Patent GB-1019296-A (GB)
Title: Improvements in gain control systems
IPC: H03G3/30
Filed: 1962-11-15
Abstract: 1,019,296. Automatic volume control circuits. COMPAGNIE FRANCAISE THOMSONHOUSTON. Nov. 15, 1962 [Nov. 15, 1961], No. 43244/62. Heading H4R. In a gain control system the output signal of an amplifier is compared to a reference voltage and when the output signal exceeds the reference voltage the error signal is used to modify the value of one or more variable impedances in one or several stages of the amplifier so as to cause the gain thereof to be inversely proportional to the input signal when the output exceeds the reference voltage. Fig. 2 shows the preferred embodiment comprising an amplifier the output from which is applied, via a potentiometer P2, to a pair of back-to-back Zener diodes DZ1 and DZ2. Signal pulses corresponding to those parts of the signal exceeding the breakdown voltage of the Zener diodes are amplified in transistor TR3 and applied to the rectifier and filter circuit 5. The resultant D.C. is applied to the variable impedance circuit 6, which comprises a diode D2 supplied with a biasing current from Zener diode DZ, the current from D1 backing of the biasing current through D2 and thereby varying the impedance of diode D2. Since diode D2 is a shunt with the emitter impedance of transistor TR1 in the amplifier 1 the gain of the amplifier is varied and tends to maintain the output constant, once the signal voltage exceeds the reference. The control may be applied to a number of stages in an amplifier.
Patent GB-1394539-A (GB)
Title: Tensioning apparatus for paper machines
IPC: D21F1/36
Filed: 1973-09-18
Abstract: 1394539 Tensioning webs THUNE-EUREKA AS 18 Sept 1973 [20 Sept 1972] 43684/73 Heading B8R A tensioning apparatus for paper making machine wires 6 comprises a tensioning roll 5 mounted in a pair of bearings 30 each of which is connected to a carriage 4 movable along rails 2 by an arm 27 pivotably connected to the carriage and biased in one direction by a pressurized bellows 8. The carriages are displaceable along the rails by a lead screw 24 driven by a motor (14, Fig. 1) to move the roll and vary the tension of the wire in response to actuation by one of three switches 34, 35, 36 which co-operate with a cam 38 on the pivotal arm 27. The centre switch 35 corresponds to central tension and in this position of the arm the motor is deactivated. The switch 34 corresponds to slackness in the wire 6, the bellows 8 pivoting the arm 27 and the motor displacing the carriages to the left until the tension in the wire overcomes the bias of the bellows and pivots the arm 27 into a position in which the cam 38 contacts the switch 35 to stop the motor. The switch 36 acts in the opposite sense with respect to the switch 34.
Patent GB-925813-A (GB)
Title: Improvements in or relating to devices for the visual display of symbols
Inventor: PUCKETTE CHARLES CLARKE
IPC: G09F11/26
Filed: 1959-12-23
Abstract: 925,813. Indicators. GENERAL ELECTRIC CO. Ltd. Feb. 13, 1961 [Dec. 23, 1959], No. 43789/59. Class 40 (1). An indicator comprises an endless band 1 passing over tensioned rollers 2, 3, 4, 5, 6 and slotted to engage roller 4 which is driven through gearing 11 and a shaft 36 by an electric motor or by a pawl 17 and ratchet 18 actuated by an electromagnet 56 under push-button control. Sliding shutters 20 cover the viewing aperture 19 while the indication is being changed, the shutters being attached to the arms of pivoted U-shaped members 17 which are operated by a plunger 31 moving under the action of an electromagnet 34 and restored by a spring 35. Each pushbutton 58 has its contacts 63 connected in a circuit which includes normally closed contacts of a different pair of relays A, B, C, D, E, F in parallel. Operation of a push-button and start key 61 actuates the relay R whose contacts R1 switch over to energize the electromagnet 56 through interrupter contacts 57 and to disconnect the energizing circuit of the electromagnet 34 so that the shutters 20 close. Six electrically interconnected cams 42 rotate with the shaft 36 and in certain positions each engages one of six sensing fingers 48 and through them operate a predetermined pair of the relays A-F, opening the energizing circuit of the relay R and thus switching over the contacts R1 to energize the electromagnet 34. Actuation of a further push-button releases the previously pushed button.
Patent GB-1461968-A (GB)
Title: Apparatus for dispersing a gas in a liquid
IPC: C02F3/20
Filed: 1974-10-10
Abstract: 1461968 Aerating liquids DRAVO CORP 10 Oct 1974 [7 Jan 1974] 44036/74 Heading B1C A diffuser 10 for aerating sewage has an elongated body 11 with at least one flat surface 18 with two parallel staggered rows of apertures 12, a plurality of flexible rectangular strips 13 with each free end overlapping at least two of the apertures, and a gas inlet or inlets 16 having nearly the same total cross-section as the body. In operation the surface 18 with the apertures is the underside of the diffuser and the strips 13 repetitively open and close shearing the gas into small bubbles, and also act as non-clogging non-return valves. An array of such diffusers may have a header as 25 which may also be provided with bubble apertures; such an array is self-regulating and does not require variation in the aperture size to equalize the dispersion of gas therefrom: The body and resilient strips may be made of stainless steel.
Patent GB-1391920-A (GB)
Title: Mixing vessel for molten iron
IPC: C21C1/06
Filed: 1972-09-22
Abstract: 1391920 Measuring temperature in metal mixers VEREINIGTE OSTERREICHISCHE EISEN-UND STAHLWERKE AG 22 Sept 1972 [23 Sept 1971] 44039/72 Heading F4B A thermocouple or other temperature sensor 5 is mounted to project into the pouring spout 2 of a metal mixer, so that its junction 7 or other sensitive part is immersed in molten metal when the mixer is tipped for pouring, but is clear of the wall of the spout when the mixer is standing. The distance between the thermocouple junction 7 and the wall of the spout should be at least 1 cm. The thermocouple has a sheath 6.
Patent GB-1162707-A (GB)
Title: Improvements in and relating to Pressure-Control Devices for Power-Water Reactors
IPC: G21C1/09
Filed: 1966-10-04
Abstract: 1,162,707. Fluid regulation. PHILIPS' GLOEILAMPENFABRIEKEN N.V. Oct.4, 1966 [Oct.7, 1965], No.44233/66. Heading G3H. In a power-water reactor primary circuit (2, Fig.1 not shown), comprising a reactor (1) and an exchanger (4) adapted for withdrawing heat from the reactor coolant, there is disposed a regulator 21 used for maintaining the coolant pressure between predetermined high and low values by compensating for fluctuations in the heat withdrawn by the exchanger. The regulator consists of a casing 21, opening through duct 22 into the circuit, and containing coolant, coolant vapour 23, heating elements 27 and a heat exchanger 26', 26" which communicates at one end with the vapour and at the other, through valve 25 and duct 24, with a second point in the circuit. With a decrease in heat withdrawn from the coolant, by the exchanger (4), the former suffers a decrease in density and so flows into the regulator via duct 22. Pressure of the vapour thus increases and upon attaining a certain value, at which valve 25 is opened, enters the exchanger, and on passing through it, condenses, giving up its heat to the surrounding coolant. Conversely, upon an excessive heat withdrawal, the density rises and so an outflow from the regulator takes place, the consequential drop in pressure being made good by evaporation of coolant. The disposition and nature of the exchanger 26, 26" and the heating elements 27 allows the temperature of the coolant within the regulator to be kept fairly constant so preventing the vapour pressure from dropping below an acceptable value. Fig.4 (not shown), indicates the arrangement of a temperature responsive control for regulating the power supply to the heating elements.
Patent GB-1021264-A (GB)
Title: Ship control system
IPC: G05D1/02
Filed: 1962-11-22
Abstract: 1, 021, 264. Automatic control of ships. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Nov. 22,1962 [Nov. 24, 1961], No. 44263/62. Heading G3R. Variations in the heading of a ship and two resolutes of the direction of a taut line between the ship and a submarine vessel are automatically converted into vector quantities representing the direction and magnitude of thrusts required to restore the heading of the ship and move it so as to maintain the two vessels in a constant relative position. In Fig. 1 a submarine vessel 11 moving along the ocean floor 12 to observe a pipeline, for example, is tethered to a mother ship 10 by means of a taut control line 15. A device 16 contains a pair of potentiometers which detect the attitude of line 15 in perpendicular planes fixed relative to ship 10. The signals from these potentiometers are compared with adjustable pre-set signals corresponding to the desired attitude of line 15 and any differences corresponding to relative movement between the vessels are applied to a resolver unit the output of which controls the orientation and thrust of each of two electric motor-driven propellers 13, 14 at each end of ship 10 so that the latter is moved to the desired relative position. The controls may include reset and derivative action. Signals from a gyro compass on ship 10 maintain a desired heading of the latter by controlling the propellers 13, 14. The thrust of the propellers is controlled by varying the energization of eddy current clutches in the drive to them and the orientation of the propellers is controlled by rotating them about vertical axes by means of follow-up servomotors. Manually adjustable signals may be substituted for those from the lineactuated potentiometers and the gyro compass by operation of a switch to change over from automatic to manual control. In a modification, vessel 11 is loosely tethered to a line supporting a weight from ship 10 which is then controlled when the distance between the two vessels is sufficient to tilt the line.
Patent GB-996033-A (GB)
IPC: C09C1/00
Filed: 1962-11-23
Abstract: A pigment for enamels consists essentially of a calcination product of oxide of zirconium, silicon and iron, in which at least 40% of the oxides are associated together in the form of an iron-containing zircon crystal lattice and the iron content, expressed as Fe2O3, is from 10 to 25% by weight.  The proportions may be ZrO2 30-75; SiO2 15-55; Fe2O3 10-25 in percentage by weight.  The production is as in the parent Specification giving in addition alkali metal ions 0.25-8; fluoride ions 0.25-12 and chloride and/or bromide ions 0.25-8. Two examples are disclosed yielding a brown-red pigment to give a coral-pink glaze.
Patent GB-1223050-A (GB)
Title: A releasable coupling for tubes and rods
Inventor: GROOMBRIDGE FREDERICK WALTER H
IPC: F16B7/04
Filed: 1968-09-18
Abstract: 1,223,050. Sectional handles. IMPERIAL CHEMICAL INDUSTRIES Ltd. 15 July, 1969 [18 Sept., 1968], No. 44403/68. Heading B4K. [Also in Divisions A4 and F2] A releasable coupling for rods and tubes comprises a female member 1, a male member 7 and a split resilient ring 5 engaging in a perimetric groove in the latter. The member 7 together with the ring with its free ends drawn close by means of lugs 6 enters in assembly a cavity 2 in the member 1 but is prevented from being withdrawn since the ring 5 partly springs out to engage a projection former by flange 3 which in its alternative form may comprise a plurality of spaced segments. The members 1, 7 may be of brass or of injection moulded polymeric material and are joined to the ends of tubes or rods to be coupled by riveting, screwing or welding. The ring 5 is preferably made of an acetal copolymer, e.g. " Kematal " (Registered Trade Mark). As shown in Fig. 8, the coupling may be adapted to join two tubes to form a fluid passage, sealing being provided by member 12. A modification (Fig. 9, not shown), uses a sealing ring (14) seated in an annular groove (15) in the male member. The lugs 6 in any embodiment may be so dimensioned as not to project beyond the surface of the coupling. A non-rotatable coupling (Fig. 10, not shown) may be formed by providing an axial lug (17) on the male members to engage the front portion of a slot in the female member. An additional lug and a corresponding slot may be provided diametrically opposite (to 17). Couplings of the invention may be used to join lengths of rod, e.g. ratan cane, or PVC tubes used when laying cables through conduit. They may also be used for joining short lengths of rod to form a handle for a device such as scraping means for use in pipes, or chimney sweeping brushes. In such applications, the coupling may be provided with axial surfaceribs (Fig. 11, not shown) to facilitate easy movement of the coupling in pipes, and to reduce the coupling wear.
Patent GB-1387808-A (GB)
Title: Device for use in indicating the operating condition of a  vehicle brake
IPC: F16D66/00
Filed: 1971-01-27
Abstract: 1387808 Indicating wear; shoe drum brakes; wear adjustment HOPE TECHNICAL DEVELOPMENTS Ltd 9 Feb 1972 [27 Jan 1971] 44500/74 Divided out of 1387807 Heading F2E The description in this Specification is equivalent to that in respect of Fig. 1 of Specification 1,387,807, but the claim is directed to a device for use in indicating when brake adjustment is required comprising a magnetically operable switch having two states and arranged adjacent a magnet, and a magnetic shield adapted to move with a part of the brake operating mechanism, the switch being held in a particular state by the magnetic field of the magnet, except when the shield is positioned so as to interrupt the field. Reference has been directed by the Comptroller to Specification 1,267,518.
Patent GB-1129473-A (GB)
Title: Improvements in or relating to portable platforms
Inventor: JENKINS PETER JOHN
IPC: E01C9/08
Filed: 1964-10-31
Abstract: 1,129,473. Laminates. DUNLOP CO. Ltd. 14 Oct., 1965 [31 Oct., 1964], No. 44507/64. Addition to 974,131. Heading B5N. [Also in Division E1] A portable platform for use as a temporary road, catwalk or bridge comprises a flexible composition having embedded therein at least two layers of individually flexible transverse metal cords with a textile reinforcement therebetween and a layer of longitudinal metal cords, the separation between the transverse layers being sufficient to confer transverse rigidity upon the platform as a whole. The longitudinal cords may be either continuous, or discontinuous and arranged in parallel overlapping relationship. Suitable metal cords may be prepared from 6 to 24 strands of zinc-plated steel wire rubberized by calendering with natural rubber composition containing a cobalt salt. The textile reinforcement may comprise one or more layers of woven fibres or weftless cords of e.g. cotton, polyamide, polyethylene terephthalate, polyolefine, regenerated cellulose or polynosic fibres. An example has two layers of transverse metal cords between which are disposed a layer of longitudinal cords, then four layers of cotton fabric frictioned with vulcanizable rubber composition and a filler layer of vulcanizable rubber composition in that order, together with outer rubber layers, the upper one being roughened or ribbed as required. Instead of natural rubber the flexible composition may be synthetic rubber or resin, e.g. plasticized polyvinyl chloride. A second longitudinal steel cord layer may be provided. Lengths of platform may be joined end to end by incorporating castellated end portions (as described in Specifications 1,058,085 and 1,058,086) and inserting a tie-pin through interengaging segments and the platform may be anchored to a castellated plate in the same way.
Patent GB-1063063-A (GB)
Title: Improvements relating to radiation sensitive devices
Inventor: CASSMAN HARRY
IPC: H01J29/45
Filed: 1962-11-24
Abstract: 1,063,063. Television pick-up tubes; photoconductive elements. ELECTRIC & MUSICAL INDUSTRIES Ltd. Nov. 18, 1963 [Nov. 24, 1962], No. 44531/62. Headings H1D and H1K. A target for a television pick-up tube comprises a conductive layer, a solid layer including photo-conductive antimony selenide, and a spongy layer including photo-conductive antimony selenide in that order. In a preferred arrangement the solid layer is antimony selenide and the spongy layer a mixture of antimony selenide and antimony trisulphide which may be overlain by a further solid layer of a similar mixture. A typical target is formed in situ in the tube. After sealing the end via a metal ring 4 (Fig. 1) the end is heated and an electrode formed by spraying on a tin salt solution. Then the tube is baked and degassed and material evaporated from boat 20 containing a mixture of antimony selenide and trisulphide in the weight ratio 4: 3 or 4:1 first in high vacuum to form the solid layer and then in argon, xenon, nitrogen or argon to produce the spongy layer. During the process material is deposited on grid 15 and shield 16 and a final solid layer may be formed by re-evaporating this in high vacuum by eddy current heating of these parts. As an alternative the layers are formed on the sealing member 3 in a demountable vessel before it is attached to the pick-up tube. In modifications of the above method, antimony selenide may be used alone, or selenium, cadmium sulphide or cadmium selenide included instead of antimony trisulphide.
Patent GB-1415307-A (GB)
Title: Belt aligning tracking rollers for closed loop systems
IPC: F16H55/36
Filed: 1972-09-27
Abstract: 1415307 Smoothing belts DYNALOC CORP 27 Sept 1972 [27 Sept 1971] 44583/72 Heading B8R [Also in Division F2] A belt 22 is trained around a pair of aligning tracking rollers 20, 20<SP>1</SP> each having a pair of helical ribs 30 oppositely handed and anchored to a substantially cylindrical body, an annular recess 31 being provided midway of the cylindrical body and means, such as a sprocket or pulley 21, for driving the rollers. The ribs 30 may be made of steel of round, rectangular or square cross-section and anchored at their ends by welding or inserting the ends into holes 34 adjacent second holes 34<SP>1</SP> for rivets 36, the wire being wound or fitted as a single or double helix in grooves 35 of round or V form and of increasing depth towards the ends of the rollers; alternatively the cylindrical body itself may be tapered to provide a crowned roller. The rollers may be mounted on shafts 18, 18<SP>1</SP> by pins 26 passing through end caps 25, the bearings 17 being adjustable on a frame 15. Centring of the belt 22 is effected by both the rollers upon rotation and a better grip may be obtained by making the ribs of waveform, Figs. 8 and 13 (not shown). If desired, one of the rollers may be wound to the opposite hand to that of the other roller, Fig. 4 (not shown) so that one roller exerts a centring thrust while the other exerts an expanding thrust. The belt may be trained around more than two rollers, Figs. 10, 11, 12 (not shown).
Patent GB-1011315-A (GB)
Title: Stabilisers for acrylic or methacrylic esters
Inventor: LOVERSIDGE RICHARD
IPC: C08F20/12
Filed: 1963-11-12
Abstract: Stabilizers for acrylic and methacrylic esters comprising 4-alkoxy phenol with less than 4 carbon atoms in the 4-alkoxy group and substituted in one or both the 2 and 6 positions by a sec. or tert. alkyl group containing at least 4 carbon atoms (see Division C2), are present during polymerization of the esters. Examples describe the polymerization of methyl methacrylate syrups containing 2,6-di-tert.-butyl-4-methoxy - phenol, and 2,21 - dihydroxy - 3,31-di - tert. - butyl - 5,51 - dimethoxy - diphenylmethane using benzoyl peroxide and a ,a -azo-di-isobutyro-nitrile as catalysts.  Other stabilizers mentioned are 2-tert.-butyl-4-methoxyphenol and 2-sec.-butyl-4-methoxyphenol.ALSO:Stabilizers for acrylic and methacrylic esters comprise a 4-alkoxyphenol containing fewer than 4 carbon atoms in the alkoxy groups, and substituted on one or both of the 2 and 6 positions with a secondary or tertiary alkyl group containing at least 4 carbon atoms. 4-Methoxy phenols are preferred, e.g. 2-tert-butyl - 2,6 - ditert - butyl-, and 2 - sec - butyl - 4-methoxyphenols; and others have a tert-alkyl in the 2-position and 2-hydroxy-3-tert alkyl-5-alkoxyphenyl methyl in the 6-position, e.g. 2,21 - dihydroxy - 3,31 - ditert - butyl - 5,51-dimethoxy - diphenylmethane. Examples describe the stabilization of methyl methacrylate by 2,6 - ditert - butyl - 4 - methoxyphenol; 2,21-dihydroxy - 3,31 - ditert - butyl - 5,5 - dimethoxy - diphenyl methane; 2 - sec - butyl - 4 - methoxyphenol; 2 - tert - butyl - 4 - methoxy phenol; n-butyl methacrylate with 2,6-di-tert-butyl - 4 - methoxyphenol; ethyl acrylate with 2,6 - ditert - butyl - 4 - methoxyphenol, and n-butyl acrylate with 2,6-ditert-butyl-4-methoxyphenol. The esters may be polymerized in the presence of the stabilizer.